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LCM and GCF Practice Worksheet

Practice worksheet for Grade 4 students covering Least Common Multiple (LCM) and Greatest Common Factor (GCF) of two numbers.

Grade 4 Math Number SenseNumber TheoryLCM and GCF
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Includes

2 Fill in the Blanks2 Multiple Choice2 Short AnswerCustom

Standards

CCSS.MATH.CONTENT.6.NS.B.4

Topics

mathgrade 4lcmgcfnumber sense
9 sections · Free to use · Printable
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LCM and GCF Practice

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Date:

Score:

Read each question carefully and answer to the best of your ability. Show your work where necessary.

1. The first five multiples of 3 are 3, 6, 9, 12, and  .

2. The first five multiples of 5 are 5, 10, 15, 20, and  .

3. A multiple of a number is the product of that number and any   number.

4. Which of the following is a common multiple of 2 and 4?

a

3

b

6

c

8

d

10

5. Which of the following is NOT a common multiple of 3 and 5?

a

15

b

20

c

30

d

45

6. Find the LCM of 4 and 6.

7. Find the LCM of 3 and 7.

8. The factors of 12 are 1, 2, 3, 4, 6, and  .

9. The factors of 18 are 1, 2, 3, 6, 9, and  .

10. A factor of a number divides the number   with no remainder.

11. Which of the following is a common factor of 10 and 15?

a

2

b

3

c

5

d

10

12. Which of the following is a common factor of 8 and 12?

a

1

b

6

c

16

d

24

13. Find the GCF of 12 and 18.

14. Find the GCF of 20 and 30.

15. Use the Venn Diagram below to find the GCF of 12 and 18.

U Factors of 12 Factors of 18 4 12 9 18 1 2 3 6